<template>
	<view class="goods-detail-container" v-if="goods_info.goods_name">
		<!-- 轮播图区域结构 -->
		<swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000">
			<swiper-item v-for="(item, i) in goods_info.pics" :key="i">
				<image :src="item.pics_big" @click="preview(i)"></image>
			</swiper-item>
		</swiper>
		
		<!-- 商品信息区域 -->
		<view class="goods-info-box">
			<!-- 商品价格 -->
			<view class="price">￥{{goods_info.goods_price}}</view>
			<!-- 信息主题区域 -->
			<view class="goods-info-body">
				<!-- 商品名称 -->
				<view class="goods-name">{{goods_info.goods_name}}</view>
				<!-- 收藏 -->
				<view class="favi">
					<uni-icons type="star" size="18" color="gray"></uni-icons>
					<text>收藏</text>
				</view>
			</view>
			<view class="yf">
				快递，免运费 -- {{cart.length}}
			</view>
		</view>
		
		<!-- 商品详情 -->
		<rich-text :nodes="goods_info.goods_introduce"></rich-text>
		<!-- 商品导航 -->
		<div class="goods_nav">
			<uni-goods-nav :fill="true" :options="options" :buttonGroup="buttonGroup"  @click="onClick" @buttonClick="buttonClick" /> 
		</div>
	</view>
</template>

<script>
	import { mapState, mapMutations, mapGetters}  from 'vuex'  
	export default {
		data() {
			return {
				// 商品详情对象
				goods_info: {},
				options: [
					{
			            icon: 'shop', 
			            text: '店铺',
			        }, {
			            icon: 'cart',
			            text: '购物车', 
						info: 0
			        }],
			        buttonGroup: [{
			          text: '加入购物车',
			          backgroundColor: '#ff0000',
			          color: '#fff'
			        },
			        {
			          text: '立即购买',
			          backgroundColor: '#ffa200',
			          color: '#fff'
			        }
			        ]
			};
			
		},
		watch: {
			// 监听total值的变化，通过第一个形参得到变化后的心智
			total: {
				// 通过数组的 find() 方法， 找到购物车按钮的配置对象
				handler(newVal) {
					const findResult = this.options.find((x) => x.text === '购物车')
					
					if (findResult) {
						// 3.动态为购物车按钮的info 属性赋值
						findResult.info = newVal
					}
				},
				// 声明侦听器是否在页面加载完毕立即调用
				immediate: true
			}
		},
		computed: {
			...mapState('m_cart', ['cart']),
			// 把m_cart模块中的名为 total的getter映射到当前页面中
			...mapGetters('m_cart', ['total'])
		},
		onLoad(options) {
			// 获取商品Id
			const goods_id = options.goods_id
			// 调用请求商品详情数据的方法
			this.getGoodsDetail(goods_id)
		},
		methods: {
			...mapMutations('m_cart',['addToCart']),
			// 请求商品详情数据
		 	async getGoodsDetail(goods_id) {
				const { data: res } = await uni.$http.get('/api/public/v1/goods/detail', {goods_id})
				if (res.meta.status !== 200) {
					return uni.$showMsg()
				}
				res.message.goods_introduce = res.message.goods_introduce.replace(/<img /g,'<img style="display: block;"').replace(/webp/g,'jpg')
				this.goods_info = res.message
			},
			preview(i) {
				uni.previewImage({
					current: i,
					urls: this.goods_info.pics.map( x => x.pics_big)
				})
			},
			// 商品导航左侧点击事件
			 onClick (e) {
				if (e.content.text === '购物车') {
					// 切换到购物车页面
					uni.switchTab({
						url: '/pages/cart/cart'
					})
				}
		
			},
			// 商品导航右侧点击事件
			buttonClick (e) {
			    if (e.content.text === '加入购物车') {
					
					//组织一个商品的信息对象
					 const goods = {
						 goods_id: this.goods_info.goods_id,
						 goods_name: this.goods_info.goods_name,
						 goods_price: this.goods_info.goods_price,
						 goods_count: 1,
						 goods_small_logo: this.goods_info.goods_small_logo,
						 goods_status: true,
					 }
					 
					 // 通过this调用映射过来的addToCart 方法，把商品信息对象存储到购物车中
					 this.addToCart(goods)
				}
			   
			  }
		}
	}
</script>

<style lang="scss">
	swiper {
		height: 750rpx;
	}
	
	image {
		width: 100%;
		height: 100%;
	}
	.goods-info-box {
		padding: 10px 5px;
		.price {
			color: #C70A0A;
			font-size: 16px;
		}
		.goods-info-body {
			display: flex;
			margin: 10px 5px;
			.goods-name {
				font-size: 13px;
				padding-right: 10px;
			}
			.favi {
				width: 80px;
				display: flex;
				flex-direction: column;
				justify-content: center;
				align-items: center;
				border-left: 1px solid #DCDFE6;
				text {
					color: gray;
					font-size: 12px;
				}
			}
		}
		
		.yf {
			font-size: 12px;
			color: #808080;
		}
	}
	
		.goods_nav {
			position:fixed;
			bottom: 0px;
			left: 0px;
			width: 100%;
		}
		
		.goods-detail-container {
			padding-bottom: 50px;
		}
	
</style>
